Back then — before there were multiple-listing services — I kept tabs on listings weekly.

当时还没有多重房产挂牌服务，我每周都要密切关注房产挂牌情况。

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Saudi health officials, working with international health agencies kept close tabs on the more than two million Muslims who made the pilgrimage to the holy city of Mecca.

VOA: standard.2009.11.29

The Cuban government said that their agents had simply kept tabs on violent Cuban-American exile groups.

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One attendee was my old friend Sam Whitmore who for years has kept tabs on the technology media spheres.

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Each of four street managers kept tabs on up to six couriers after handing over the vials from the call center.

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